Earth boring machine with crushing rollers

Details Earth boring machine with crushing rollers Earth boring machine with crushing rollers

1977-06-29

1980-02-05

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175102, 175213, 175333, E21B 922

Patent

active

041868080

ABSTRACT:
An earth boring machine with a rotating cutter head having a multiple of individual cutters positioned at different distances from the center of rotation and angularly spaced from one another on the cutter head while the cutter head itself is shaped to direct the cuttings into a collecting area, which may be under the center of the rotary head or which may be concentric about the center area, has elevator means, which may be mechanical, hydraulic or pneumatic, to remove the cuttings from the collection area, and has one or more crushing rollers thereon arranged to crush cuttings which are too large for effective removal by the elevator means into small chips or fragments together with barrier means for restraining such oversize pieces in the path of the crushing roll or rollers so as to prevent their entry into the collection area until they have been adequately crushed. The barrier means so provided are arranged to permit the smaller fragments and chips to move into the collection area with little impedance.

REFERENCES:
patent: 3285355 (1966-11-01), Neilson et al.
patent: 3292719 (1966-12-01), Schumacher, Jr.
patent: 3360061 (1967-12-01), Canalizo
patent: 3379264 (1968-04-01), Cox
patent: 3384191 (1968-05-01), Schumacher, Jr. et al.
patent: 3511539 (1970-05-01), Schonfeld

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